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Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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1answer
26 views

DRV8889 SPI Commands

I've been having some issues diagnosing the relationship between writing to the registers through SPI commands and stepping the motors. That is, it seems like when I write SPI_STEP=1 (and STEP=1) to ...
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3answers
57 views

Real Power or Reactive Power in Superconducting Motors?

My circuits class is teaching that in AC power, there are two kinds of loads. One is a resistive load, with absorbs power at all times. The other is a reactive load, which absorbs zero average power. ...
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PSC motor speed affected by capacitor?

I replaced the induction motor in my furnace (PSC type), and it was suggested that I replace the run capacitor at the same time. (They are both 20 years old). The new motor is a Fasco A136, ...
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1answer
41 views

DC brush motor EMI

What kind of frequency does a DC brush motor generate? There are a few explanations online as to what causes EMI in DC brush motors (commutator sparking for example) and how to reduce it, but no ...
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2answers
39 views

Does only wiring 2 poles of a 3 pole overload relay have any effect?

When wiring a single phase starter, they tend to jumper the overload such that all phases of the overload are used. Now, considering that the overload has 3 separate bimetal strips all connected to ...
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0answers
125 views

Calculating the required motor for a mobility scooter [migrated]

I need to calculate the required motor for a mobility scooter with the following user requirements. The mass of the scooter with passenger = 120kg Max Speed of scooter = 9Km/h ...
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1answer
26 views

Running 3 phase asynchronous motor below nominal torque

In class we have a 3 phase asynchronous motor which says 400V delta 690V star. The nominal torque of the motor is 3,7Nm. Can the motor run safely nominal charged on 400V in star configuration? I'm ...
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36 views

Issue with universal motor velocity control by microcontroller

I'm using the circuit in the picture with a BTB12 600BW snuberless triac to control an universal motor (picked from a old washing machine, 220 VAC, 50 Hz) controlled by an arduino nano in customized ...
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1answer
21 views

Hi motor driver help [closed]

I am trying to build a product with a motor and a raspberry pi I am having great difficulty understanding what tells me if the driver board is compatible with a specific motor For example I have been ...
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2answers
34 views

Low-RPM motor with limited torque for a newbie [on hold]

I'm developing ... an electric yarn winder for medieval distaff. The aim is to spin wool on the spool, keeping certain tension level. I mean, when the tension is too strong, the motor should not break ...
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0answers
25 views

12v DC motor info ?? Schematics ???? Fix? (DRCP5030LA) [on hold]

Any one familiar with this motor (DRCP5030LA) I pulled it off a refrigerator it's for the evaporation fan . Except iv never seen a motor like this one I was playing with some magnets with it and it ...
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0answers
32 views

motor driver voltage [on hold]

I am a complete beginner working on my first project. I need a motor which will be controlled by a raspberry pi. I see that to do this I need the intermittent motor driver. How do I tell if a motor ...
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0answers
25 views

Electrical device to keep circuit open once an open is detected

I'm working on a laboratory setup that has eight electric motors running at high speed. The motors are enabled by sending a 5 V enable signal from a NI DAQ setup/LabVIEW to the motor amplifiers. ...
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2answers
45 views

3 phase Motor connection, 230V delta or 400V star?

I have a motor with specifications: star 400V delta 230V and motor is of course 3 phase. Now the question is, how can I connect the motor to delta connection if I have only 400V line to line ...
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1answer
51 views

Why would a motor manufacturer offer multiple coil winding types?

I'm currently looking through a part catalog from a motor manufacturer and notice that you can purchase this motor with different motor winding types. Specifically, you can order the motor coil wound ...
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2answers
96 views

is it possible to control 8 motors with 74hc4051?

I need to control 8 motors from Arduino. speed control only with a single pwm output I use a single channel at time I have 74hc4051 analog/digital mux/demux ic if I set mosfet drive circuit ...
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0answers
24 views

Assistance with getting VM3558T motor running

Good afternoon, I've spent quite a while trying to figure out this problem but this field is not my expertise. I'm trying to build an ABS plastic shredding machine for recycling - I've got ...
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1answer
41 views

PMSM Rotor Design. Are these terms equivalent?

I'm working on a project with a PMSM. As I go through the literature I come across the following terms and wanted to make sure that I am getting right which ones are synonyms. Surface-mounted PM = ...
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0answers
48 views

Linear motor to power chisel mechanism

I'm building a powered chisel and am considering using a linear tubular motor to power the hammer mechanism. It seems like a perfect fit. However when I searched out similar types of commercially ...
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2answers
145 views

Can the USB interface be used in real-time works

USB works similar to the Master and Slave architecture. There is an Host which is manage the bus as like a Master. There can be various "devices" which is managed by host like slaves. I wonder that ...
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0answers
12 views

Wiring a Westinghouse 312P787 electric motor [migrated]

I have an electric motor, Westinghiouse 312P787 3/4 HP Single phase 115/230 volt 1725/1140 RPM with a start capacitor. I would like to use it to run my drill press. There is no wiring diagram and I'...
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1answer
77 views

Wiring a multi-speed motor from a tower fan

I am trying to fix a tower fan from a friend. He found out that the motor was working, but something on the circuit board wasn't. He then took apart the board from the motor without remembering which ...
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1answer
36 views

How brush shifting affects current distribution in dc machines?

I understand that how armature reaction causes neutral plane to shift by some angle . If brushes are placed along Geometrical Neutral Axis, then there'd be sparking during commutation as voltage ...
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2answers
70 views

Induced EMF in electrical machines

I am currently working with machines and when I try to understand their principles in-depth, specifically in machines, I got to know that EMF is induced because of any of the two reasons: 1) Time-...
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1answer
60 views

can use these printer motors to made CNC machine? [closed]

can i use this motor to make a cnc plottor ? is there any way to make a stepper motor using this motor?
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3answers
49 views

Brushless DC motor values at voltage other than nominal

I am currently using a maxon three phase BLDC motor (datasheet PN:412825) that is rated for 48 volts (see spec sheet below). I am running the motor at 18.5 volts (requirement for my application). I am ...
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4answers
2k views

Is a PWM required for regenerative braking on a DC Motor?

The DC Motor is question is here: DC Motor I was wondering if you use a diode and a switch in a manner shown in the below picture if the motor would exhibit regenerative braking when SW1 is open? (...
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1answer
29 views

connecting single phase motor to UK mains AC

I have a single phase single volt (UK 220-240) 1Hp electric motor with two capacitors, start and run. As photographed. This is to run my Milling machine. I need to connect the motor, via ...
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1answer
36 views

Best way to power 2 motors with 1 power supply?

I have 2 identical DC motors rated at 12 volts each. I also have a 12-volt power supply. If I put these in parallel, would the motors draw their required current, or is it limited to the current drawn ...
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2answers
70 views

Determining motor position with EMI

I would like to determine the position of a motor based on its radio emissions, I do not have access to said motor but I am trying to reverse engineer it. Here is what I know about it : It has X ...
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1answer
61 views

Help needed to select proper electric motor for constant drive

I need about 180 degree movement, back and forth in about one second. Maximum torque is about 2.2 kg ⋅ cm. I have tried RC-servos (up to 20 kg ⋅ cm), but they all burn within first 12h (maximum drive ...
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1answer
56 views

How can I Power a 20-50mA LED from the 240V AC Wires of a Motor in a Safe Way?

I own an ice cream machine which is perfect, except it lacks a light so one can check the state of the process. The motor case would be the perfect place to install a white LED, which will consume ...
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0answers
24 views

Motor Control Reverse Current Diode

I'm having an intermittent issue with a motor control setup I'm working on. I'm using a Pololu G2 18v17 motor driver controlled simply with an Arduino. I have a current limiting resistor installed on ...
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3answers
88 views

What are the bottom group of diodes for on BLDC motor control circuits?

I'm studying the control circuit for a BLDC motor and I can't figure out what function the diodes serve that I point to in the basic diagram. What are they for? At what point in the basic operation ...
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2answers
34 views

What terms to differentiate between a quasi-synchronous motor (eg an induction motor ) and a completely asynchronous motor (eg a universal motor)?

I am editing a table of motors. I am looking for the correct terms to distinguish two types of motors: motors whose speed is less than the AC frequency (all inductions / squirrel cage motors) from ...
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1answer
145 views

Spikes in raw acceleration data from AC motor

I have an MCU with an accelerometer, tightly mounted onto an AC motor inside a production hall. Once an hour, it collects 1 sec. (Sample rate is 5000) of acceleration data for the motor and saves it. ...
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1answer
68 views

What is the formula for calculating the no load current of a 3-phase motor? [closed]

I am looking for the formula, not a rule of thumb. Is there a way to calculate the no-load current?
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2answers
96 views

Is 1 Hz equal to 1 rotation of a motor shaft?

I'm rather new to the world of electronics but I have been trying to find the frequency of a DC motor. I've found that 1 hz is equal to 1 revolution per second, but does that refer to shaft rotation ...
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2answers
48 views

Connecting 3phase motor to FC [closed]

I'm connecting 3 phase motor to frequency converter and I don't understand why to use shield cables. Is using shield cables a must in every situation or only when nearby is running a Profinet or other ...
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3answers
3k views

What is the name/purpose of this component?

I was wondering what is the role/purpose of the electric component in the red square. This is the schematic of a 230V single phase induction motor. What is also not clear to me are the connections on ...
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3answers
584 views

Why would an AC motor heavily shake when driven with certain frequencies?

I have an AC motor from an old TCL 160 Boxford NC Lathe, it has three wires named U V and W. I thought that incorparating the original driver to a modern control interface card would be difficult or ...
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1answer
37 views

DQ frame in foc of induction motor

How to find the orientation of DQ axis of rotor and stator in induction motor using iq and Id currents? Particularly in foc of im, I have measurement of stator ia, ib, ic and rotor omega. However, ...
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2answers
116 views

Does this vacuum motor use DC or AC power?

If this is not the right SE for this, which would be a better one? This is a listing on Aliexpress. I gave the motor DC power at 12, 24, and 32vdc and did not limit the amps. The motor gave one ...
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0answers
29 views

Replacing 5-Wire Fan Capacitor with a Capacitor of Different Capacitance

I have an old 3 speed ceiling fan that pretty much doesn't spin. It doesn't start by itself (if I start it by hand it will keep on spinning, but slowly). Some of the speeds don't work at all, even ...
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1answer
35 views

Trajectory generation for motor

I want to implement a s-curve trajectory generator for a motor controller, but I'm struggling with how it should behave to be useful. There are different papers out there with the implementation for s-...
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1answer
84 views

Confusion regarding a 12V DC motor's RPM

I have a 550 DC motor of 12V, 45W and 10K RPM installed on a wheel, which is not causing the wheel to turn fast enough when the motor is connected to a 12V battery. I replaced the motor with an older ...
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2answers
61 views

Check the position on analog servo [closed]

In analog servo, how to set the position with hands then check the position in raspberry pi,yes i know potentiometer can do that but i want with servo motor. Now, i can increase decrease the speed of ...
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2answers
63 views

Does my motor need a second capacitor?

First things first - I am a complete novice. Thank you in advance for your help. I bought a motor second hand, though it has never been used. My aim is to have it run my table saw. What I know: ...
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0answers
38 views

Strange behavior from single phase BLDC

I've recently been working on a pump that contains an impeller controlled by a simple brushless motor driver. The driver is very similar to one for a 12v fan which makes sense as the pump is part of a ...
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1answer
94 views

can I use dc 12v motor in kerosene? [closed]

I do want to run a motor under kerosene, before to that I want to know that will it be dangerous or not?